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【单选题】
底坑高度为（）m以上时，应设梯子。A.
1.5
B.
1.6
C.
1.7
D.
2.0
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【简答题】语法9. When _________(ask) about the secret of his success, Steven Spielberg said that he owes much of his success and happiness to his wife and children.
【单选题】As a salesman, much of his success comes from being what his customers want.
A.
in competition with
B.
in contrast with
C.
in company with
D.
in tune with
【单选题】He ____ much of his success and happiness _____his wife and children.
A.
thanks; to
B.
owes; to
C.
owns; to
D.
thinks; highly of
【简答题】具有下列化学结构的药物是（ ）
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